We do not need any other source than the Bible. It was given to us, and is sufficient for us. When reading commentaries, study guides, or other educational books about the Bible, remember they were written by man. Many times those tools will be helpful in understanding passages or give good insight into a verse. Often times it can be easy to put too much of man's ideas into a book and not rely on what the Bible is telling us. So read those books, pamphlets, or articles w